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液力变矩器工作在高速旋转状态，总成焊后的上盖和泵轮的同轴跳动具有严格的精度要求。本文详细讨论了影响液力变矩器填丝ＴＩＧ点固焊后上盖和泵轮的同心精度的要素，包括工件状态、工件结构、机械状态、焊接工艺等影响要素，引入了精度误差理论，对液力变矩器填丝ＴＩＧ点固焊接系统的同心精度综合进行定量分析和设计，建立了该系统的同心精度控制数学模型，讨论了各影响因素的同心精度综合方法和合成系数的确定方法。通过对该模型的分析和解析，得到了在较低成本下保证上盖和泵轮的同心对中精度的工装设计要求，并研制了符合实际生产要求的加工系统。
Torque converter work in high-speed rotation state, the assembly after welding cap and pump coaxial beating with strict accuracy requirements. In this paper, the factors that affect the concentric accuracy of the top cover and the impeller after TIG spot welding with hydroforque torque converter are discussed in detail, including the influence factors of the workpiece state, the workpiece structure, the mechanical state and the welding process. The precision error theory, The quantitative analysis and design of the concentric accuracy of the TIG solid welding system with the filler of the torque converter were completed. The concentric precision control mathematical model of the system was established. The concentric precision comprehensive method and the determination method of the composite coefficient . Through the analysis and analysis of the model, the tooling design requirements of ensuring the concentric centering accuracy of the top cover and the pump impeller at lower cost are obtained, and the processing system that meets the actual production requirements is developed.